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BIG TREES
OKLAHOMA STATE CHAMPIONS
The Forestry Division of the State Department of Agriculture
maintains the official Big Tree list for the State of Oklahoma. The
American Forestry Association is responsible for the National Regis­ter
of Big Trees, noting the National Champions for most native and
naturalized tree species in the United States. Oklahoma currently
has only one National Champion: the Blackjack Oak near Wakita in
Grant County.
The Forestry Division encourages new entries for species on
the list, and for those not presently listed. Accurate species
identification is extremely important. Common and scientific names
should conform to the Checklist of United States Trees (Native and
Naturalized), by Dr. Elbert L. Little. -
A tree's "bigness" is determined from a combination of three
measurements:
1. Circumference, in inches, as measured at 4y, feet above the
ground (DBH). If the trunk is deformed at this point, use the smal­lest
diameter below this height. If the trunk forks below 4y, feet,
measure the largest fork.
2. Height, in feet, is the vertical distance from the ground
to the topmost branch in the crown.
3. Crown spread, in feet, is the average of the maximum and
minimum spreads, from branch tip to branch.
The point total is determined by adding the Circumference (in
inches), the Hejght (in feet), and one-fourth of the average Crown
Spread.(in feet. Entries are then compared to designate the Cham­pion
trees for each species.
The following information is needed in addition to the above
measurements to nominate a tree: accurate location, name and ad­dress
of landowner, name and address of reporter, and other items
which will help a forester relocate the tree. Please send entries
for Big Trees to:
Thanks for your interest!
species considered native
other trees.
State Department of Agriculture
Fores try Di vi s ion
122A State Capitol Building
Oklahoma City, Oklahoma 73105
(405) 521-3886
The list that follows includes those
and naturalized, followed by a list of

BIG TREES
OKLAHOMA STATE CHAMPIONS
The Forestry Division of the State Department of Agriculture
maintains the official Big Tree list for the State of Oklahoma. The
American Forestry Association is responsible for the National Regis­ter
of Big Trees, noting the National Champions for most native and
naturalized tree species in the United States. Oklahoma currently
has only one National Champion: the Blackjack Oak near Wakita in
Grant County.
The Forestry Division encourages new entries for species on
the list, and for those not presently listed. Accurate species
identification is extremely important. Common and scientific names
should conform to the Checklist of United States Trees (Native and
Naturalized), by Dr. Elbert L. Little. -
A tree's "bigness" is determined from a combination of three
measurements:
1. Circumference, in inches, as measured at 4y, feet above the
ground (DBH). If the trunk is deformed at this point, use the smal­lest
diameter below this height. If the trunk forks below 4y, feet,
measure the largest fork.
2. Height, in feet, is the vertical distance from the ground
to the topmost branch in the crown.
3. Crown spread, in feet, is the average of the maximum and
minimum spreads, from branch tip to branch.
The point total is determined by adding the Circumference (in
inches), the Hejght (in feet), and one-fourth of the average Crown
Spread.(in feet. Entries are then compared to designate the Cham­pion
trees for each species.
The following information is needed in addition to the above
measurements to nominate a tree: accurate location, name and ad­dress
of landowner, name and address of reporter, and other items
which will help a forester relocate the tree. Please send entries
for Big Trees to:
Thanks for your interest!
species considered native
other trees.
State Department of Agriculture
Fores try Di vi s ion
122A State Capitol Building
Oklahoma City, Oklahoma 73105
(405) 521-3886
The list that follows includes those
and naturalized, followed by a list of